[1/2] mlang: Add implementation of fnIMLangFontLink_GetCharCodePages

[Vitaly Perov]

Hi! Thank you for your comments

> It doesn't really matter what code pages Windows supports, it does
> matter though what code pages are valid. You need to use Win32 APIs
> EnumSystemCodePages/GetCPInfo/MultiByteToWideChar instead of accessing
> Wine internals directly.

I used EnumSystemCodePages before, but in this case GetCharCodePages set some 
extra bits in result. So the result differ from Windows

> ... or rather use mlang internal mlang_data structures.

I's good idea! Thank you!

-- 
Best wishes,
Vitaly Perov
Russia, Saint-Petersburg. www.etersoft.ru